That should be expected as it is a natural principle. Most projects are dead because of poor management by the team members because they lack the expertise in crypto and failed to seek for counsel from experts. Also, projects with no backing product or tangible ideology behind is likely to go down the drain as it will lose the interest of potential investors.
I don't it's just that, first reason it's the bear market and two would be the teams are leaving and forgetting about their projects after they get the money from the ICO and if we wanna shortcut that in one word it would be a SCAM.